The key element in realizing compact and rugged laser projectors is an efficient and reliable, diode-pumped solid-state RGB laser source. In this work, we proposed to develop an efficient diode-pumped RGB laser source based on a green-pumped OPO. The OPO signal wavelength is around 940 nm and the idler wavelength is around 1230nm. The signal and idler outputs are then frequency-doubled to produce blue light around 470 nm and red light around 615 nm.